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20030807: Level2 Radar Data

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  • Subject: 20030807: Level2 Radar Data
  • Date: Fri, 08 Aug 2003 11:20:55 -0600
Eric,

GEMPAK 5.6.J does not read LevelII data files.

I have fitted GEMPAK 5.6.K with the NASA/TRMM RSL library routines
for displaying the products.

Some points to make:
1) The CRAFT data has all tilt and paramaters in a single file.
   I created a program gpnexr2 to allow the user to specify which
   parameter and tilt level within the radar file to plot. Otherwise,
   the other programs without this information will default to plotting 
   base reflectivity for tilt 0.

2) The CRAFT data does not have the station ID in the data. In you use the
   CAPS decoder (nexradII), you need to name file files like:
   $RAD/craft/KILN/KILN_YYYYMMDD_HHNN

   This is the template I have in the datatype.tbl file for NEXRADII
   so that the program knows which station the file represents.

   I have wrapped a decoder dcnexr2 which uses a command line argument
   from the LDM to store the station ID in the data file in unused bytes of
   the data, so if you use that pqact.conf entry, you don't have to
   be as strict with the file naming....but I still use the NEXRADII template.
 
3) I have created a program nexr2rhi for plotting RHI cross sections through
   the volume scan.

I am trying to get the tarfiles on the web site todar for the new distribution.


Steve Chiswell



>From: Eric Nelson <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200308071555.h77FthLd022119

>
>I'd like to begin ingesting data from the CRAFT project.  I downloaded the
>decoder from the CAPS page.  Are there any issues concerning using GEMPAK
>to view the data that I should be aware of? (i.e where GEMPAK expects the
>data to be located, what progs can/cannot use the data, table/files
>that need to be modified, etc)
>
>Current gempak version = 5.6.j
>
>Thanks
>-Eric
>
>--
>________________________________________________________________________
>Eric Nelson                                                            |   
>                                                                       |
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   |
>+ College of Dupage Meteorology Dept. + Research Applications Prog. +  | 
>+ Weather Data Manager                + UCAR/NCAR                   +  | 
>+ http://weather.cod.edu              + http://www.rap.ucar.edu     +  | 
>+ address@hidden             + address@hidden        +  |
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   |
>                                                                       |
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>________________________________________________________________________
>